Another recent material that shows potential is the lanthanum superhydrides [1]}, conventional superconductors with high critical temperature and thus high critical field which may support superconducting states even with a spin-imbalance and thereby manifest spatially non-uniform pairing. Beyond terrestrial experiments, theories of more exotic matter such as neutron superfluids in the crust of magnetars [2]} and quark matter [3]} also support the existence of superconducting states with spatially non-uniform pairing, and indeed the high energy physics and quantum chromodynamics communities have long known of and been searching for such states [4]}.
